\documentclass{article}
\usepackage{amssymb,amsmath,amscd,concmath}
\pagestyle{empty}
\begin{document}
\begin{equation*}
1Bonus = Bonus = -1Malus
1Malus = Malus = -1Bonus

1Bonus + 1Malus = 1Neutre

1Bonus - 1Malus = 2Bonus\end{equation*}
\end{document}
